Reminder - no plan survives breakfast.
- Feel free to send pull requests to the repo!
- Here’s a contributing guide!
- Here’s the guide for creating pull requests that smurfd used and recommends!
Today
- Today's episode is brought to you by HTTP Error Code 429!
- Via keanu.codes
- Vertical tabs shipped last year! Here are prefs for controlling the expand behaviour:
sidebar.animation.expand-on-hover.delay-duration-mssidebar.animation.expand-on-hover.duration-ms
Q: I'd like an overview of how the whole FF testing infrastructure works
- Interop
- https://wpt.fyi/interop-2025?stable
- https://mozilla.github.io/standards-positions/
- Looking at some of our tests
- https://searchfox.org/firefox-main/source/browser/components/backup/tests
- Interop
Updating newtab's UI out of band from the rest of the browser
- https://addons.mozilla.org/en-CA/firefox/addon/new-tab-override/
- RemoteSettings
- https://remote-settings.readthedocs.io/en/latest/
- https://firefox-source-docs.mozilla.org/services/settings/index.html
Chat
- Join us in the Livehacking room on Mozilla’s Matrix instance! Here’s documentation on how to join. I’m only sorta monitoring the Twitch chat. A bot will try to bridge Matrix and Twitch (joc-bridgebot).
Links
- Felicia Bacon
- nbp hacks on the SpiderMonkey JS engine
- Alessandro Castellani has been streaming himself livehacking on Thunderbird
- emilio hacks on Firefox!
- Compiler Compiler - watch a Mozilla engineer hack on the SpiderMonkey JavaScript engine!
- How mconley uses Mercurial
- Andreas Kling hacks on a custom browser engine for a hand-rolled OS called SerenityOS
- The Joy of Coding: Community-Run Episode guide
- Feel free to send pull requests to the repo!
- Here’s the guide for creating pull requests that smurfd used and recommends!
- I've been mirroring the episodes to YouTube
- Code Therapy with Danny O’Brien
- Watch a developer put together a Windows game from scratch (no third-part engines) - really great explanations: https://handmadehero.org/
- /r/WatchPeopleCode for more livehacking!
Glossary
- BHR - “Background Hang Reporter”, a thing that records information about when Firefox performs poorly and sends it over Telemetry
- e10s ("ee ten ESS") - short for Electrolysis, which is the multi-process Firefox project
- CPOW ("ka-POW" or sometimes "SEE-pow") = Cross-Process Object Wrapper. See this blog post.
- Deserialize - "turn a serialized object back into the complex object”
- Serialize - "turn a complex object into something that can be represented as primitives, like strings, integers, etc
- Regression - something that made behaviour worse rather than better. Regress means to “go backward”, more or less.
- l10n - localization
- a11y - accessibility
- i18n - internationalization
- k8s - kubernetes
Feedback
- @mconley@mozilla.social on Mastodon
- @mike_conley on Twitter
- You can chat with me on Matrix at @mconley:mozilla.org
- mikeconley.ca/blog
- mconley at mozilla dot com